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IW3614 Datasheet(PDF) 1 Page - Dialog Semiconductor |
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IW3614 Datasheet(HTML) 1 Page - Dialog Semiconductor |
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1 / 18 page  Rev. 0.7 iW3614 Page 1 PReliminaRy iW3614 AC/DC Digital Power Controller for High Power Factor Dimmable LED Drivers 1.0 Features ● Isolated AC/DC offline 100 V AC / 230 VAC LED driver ● Meets harmonic requirements, high power factor (power factor > 0.9 without dimmer) ● Line frequency ranges from 45Hz to 66Hz ● Intelligent wall dimmer detection x Leading-edge dimmer x Trailing-edge dimmer x No-dimmer detected x Unsupported dimmer ● Hybrid dimming scheme ● Wide dimming range from 1% up to 100% ● No visible flicker ● Resonant control to achieve high efficiency, 85% without dimmer ● Temperature compensated LED current ● Small size design x Small size input bulk capacitor x Small size output capacitor x Small transformer ● Primary-side sensing eliminates the need for opto- isolator feedback and simplifies design ● Tight LED current regulation ± 5% ● Fast start-up, typically 10µA start-up current ● Hot-plug LED module support ● Multiple protection features: x LED open circuit protection x Single-fault protection x Over-current protection x LED short circuit protection x Current sense resistor short circuit protection x Over-temperature protection x Input over-voltage protection 2.0 Description The iW3614 is a high performance AC/DC offline power supply controller for dimmable LED luminaires, which uses advanced digital control technology to detect the dimmer type and phase. The dimmer conduction phase controls the LED brightness. The LED brightness is modulated by PWM-dimming. iW3614’s unique digital control technology eliminates visible flicker. iW3614 can operate with all dimmer schemes including: leading-edge dimmer, trailing-edge dimmer, as well as other dimmer configurations such as R-type, R-C type or R-L type. When a dimmer is not present, the controller can automatically detect that there is no dimmer. iW3614 operates in quasi-resonant mode to provide high efficiency. The iW3614 provides a number of key built- in features. The iW3614 uses iWatt’s advanced primary- side sensing technology to achieve excellent line and load regulation without secondary feedback circuitry. In addition, iW3614’s pulse-by-pulse waveform analysis technology allows accurate LED current regulation. The iW3614 maintains stability over all operating conditions without the need for loop compensation components. Therefore, the iW3614 minimizes external component count, simplifies EMI design and lowers overall bill of materials cost. 3.0 Applications ● Dimmable LED luminaires ● Optimized for 3W - 15W output power ● Capable of higher output power with enhanced external driver iW3614 |
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